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Recent content by upaa27

  1. upaa27

    Tesla Coil Build Thread

    Thanks! :)
  2. upaa27

    Tesla Coil Build Thread

    I did try that, it didn't do much though. The 7414 has too wide a hysteresis band(it did work for some people though) so the newer drivers use a comparator. Hmm... :thinking:
  3. upaa27

    Tesla Coil Build Thread

    Thanks! I am using Steve's UD 1.3b. Unfortunately, without phase lead I am switching about 70 degrees too late! Nasty spikes on the bridge output!
  4. upaa27

    Tesla Coil Build Thread

    Hi guys! Here is my DRSSTC. CM600 full bridge. Slightly modified UD 1.3b. Photos are 340V on the bridge, around 500A primary current, 240bps and 190us on time. It makes 4-5 feet of spark until I redo my bus cap configuration. Thanks for looking!
  5. upaa27

    Tesla Coil Build Thread

    Here are some of my coils. Fullbridge PLL SSTC. Half wave rectified mains. Same coil only using antenna feedback into a buffer. Fullwave rectified 240 from a step up transformer. Driver is Sigurthr's USSTCC! Thanks Sig! Class E PLL SSTC. Filtered mains in this picture. Resonant...
  6. upaa27

    Can anybody machine this?

    It was finished last year. The build was also finished however one of the driver's ICs popped off and I procrastinated on buying a new driver and got sidetracked by other projects. I will see if I can get it up and running next weekend when I have time. Thanks for the interest! :)
  7. upaa27

    Running a 240V/50Hz MOT on 120V/60Hz

    To help with the mot's leakage inductance and saturation issues a good amount would be to wind at least 20 extra turns on the primary. This would allow you to remove those shunts. I heard it brings the magnetizing current to under 500 ma for adding 30 extra turns. This will also increase your...
  8. upaa27

    Tesla Coil Build Thread

    Ah yes. You mentioned that to me earlier. My memory failed me there. ;) Any trustworthy smps companies that you know of? They are cheaper and the frequency makes them a bit easier to use for some purposes.
  9. upaa27

    Tesla Coil Build Thread

    That's a really lucky ebay find! For the smps, yes, the load determine the draw. I think tha it is the resistance(or impedance if you don't rectify it) of the plasma that determines the current. I had one on hand from an old neon sign. I used it to power a discharge tube with 22 ma optimal...
  10. upaa27

    Tesla Coil Build Thread

    Is it an old one or a small switched mode psu? I had trouble before with my smps as it said 30 ma but actually measured around 3.
  11. upaa27

    Tesla Coil Build Thread

    He needs fast diodes. Those are for 60hz. I think they might make switched mode ones nowadays though but those are hard to find.
  12. upaa27

    Tesla Coil Build Thread

    You can find them online. RadioShack won't have those diodes
  13. upaa27

    Tesla Coil Build Thread

    Get diode's rated for your voltage and double that, and find ones that say that they are fast. Make a rectifier. There are plenty of instructions for it online.
  14. upaa27

    Tesla Coil Build Thread

    Caps don't make noise in curcuit when discharging AFAIK. The crack is the quick breakdown of the air when you discharge it manually. But in your case the popping you hear when it's running is the spark gap which is the same thing as above just the gap is positioned so that it breaks down for...
  15. upaa27

    Tesla Coil Build Thread

    Idk about winding a transformer as you need an iron core and I wouldn't know how to set that up. 60hz is standard for neon sign transformers. 16000 hz is too high because your capacitors do not react well with that frequency. The dielectric is glass which high frequency passes through...




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